Inclined lidar observations of boundary layer aerosol particles above the Kongsfjord,Svalbard |
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Authors: | Astrid Lampert Johan Ström Christoph Ritter Roland Neuber Young Jun Yoon Nam Yi Chae Masataka Shiobara |
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Institution: | (1) Birla Institute of Technology and Science, Pilani-K.K. Birla Goa Campus, Zuarinagar, Goa, 403726, India;(2) National Centre for Antarctic and Ocean Research, Vasco-Da-Gama, Goa, 403804, India; |
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Abstract: | An inclined lidar with vertical resolution of 0.4 m was used for detailed boundary layer studies and to link observations at Zeppelin Mountain (474 m) and Ny-Ålesund, Svalbard. We report on the observation of aerosol layers directly above the Kongsfjord. On 29 April 2007, a layer of enhanced backscatter was observed in the lowest 25 m above the open water surface. The low depolarization ratio indicated spherical particles. In the afternoon, this layer disappeared. The ultrafine particle concentration at Zeppelin and Corbel station (close to the Kongsfjord) was low. On 1 May 2007, a drying process in the boundary layer was observed. In the morning, the atmosphere up to Zeppelin Mountain showed enhanced values of the backscatter coefficient. Around noon, the top of the highly reflecting boundary layer decreased from 350 to 250 m. The top of the boundary layer observed by lidar was confirmed by radiosonde data. |
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